Hand-drill



R. E. BEAUBIEN,

HAND DRILL. APPLICATION FILED APR. Is, I9`I9.

UNITE@ STATES( raras-r* *or-Fica .i

ROBERT E. BEAUBIEN, or CHICAGO, ILLINOIS'.`

HAND-DRILL. f

^ Application filed April 18,

To all whom t may concern.'

Be it known that I, ROBERT E. BEAUBIEN,y citizen of the United States, residing at Chicago, Illinois, have invented certain new and useful Improvements in" Hand-Drills; and I do hereby declare the followingto be` a full, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use the same'.

My invei'ition relates to hand drills, its general'v objects being to' provide an unusually simple and easily manufajctured drill including a geared operating mechanism,- to

provide convenient means for storing the showing this before the needed drill points, and to secure a stiff frame while employing light metal. More particularly, my invention aims to provide a geai'ed hand.V drill so designed that most of its parts can be manufactured by simple punch press operations;Y to provide simpleV and effective means for stilfening the frame; to utilize some of the stiffening means for storing drill points and for maintaining the gearing intermeshed; and to accomplish the further and more detailed objects appearing from the followingspecilication and from the accompanying drawings, in which- Figure lis an' elevation of the preferred embodiment of my invention.

Fig. 2 is an enlarged' transverse vsection through the' saine looking" upward from the bottom of the' pinion in- Fig. 1.

Fig. 3 is an enlarged and fragmentary View of a portion of the gear and of the pinion teeth engafed therewith.

1 Fig. lis an enfarged longitudinal section through the handle and the drill-case, taken centrally of Figi. l.

Fig. 5 is an enlarged transverse section through the handle and drill-case, taken along the correspondingly' numbered line'in Fi l l.

Fig. 6 is an enlarged and fragmentary section through another embodiment of my invention, namely one in' which' the metal parts are secured to each othery by4 two rivets and in which the crossbar inthe forward loop is omitted.

Fig. 7 is an' elevation? of a' hand drill similar to that of Fig. l, but employing a Specication'of Letters Patent. Patellfd 14, A

1919. seriaino. 291,008.

of a drill' point suitable for use with my in@AV Vention. Y* v p Fig. 12 is a perspective View ofthe kbody of the' drill case which stiffens the handle, p

p handle loop is' clamped around it:

In the embodiment ofk Figs. 1 and 7 thel framev of my hand drill is constructed of two pieces of flat strip steel, of which `the shorter forms a cross-bar across the forward loopV of the longer strip. This longer strip is' bent substantially V'into a pair of loops connected by approximately parallel parts,

the rear loop being desirably rounded to afford a handle l. Theforward' loop 21desirably has its extreme forward end flattened transverselypof the axis of the frame of my appliance and perforated to afford` the forward bearing for the shank 3 of a drill chuck. This shank 3 also vextends through a central perforation'in a crossbar t which spans the loop 2. At the rear end of this loop the two strip portions are dished out so as to form opposed recesses housing a steel ba-lll 5 which forms4 a thrust bearing.A

for the lower end of the drill chuck shank 8.. This lower end desirably is smaller in diameter than the main portion of the said shank and is' knurled during its inanufaic-- ture, after which. this contracted end iS pressed through the bore of a `pinionththus firmly securing the pinion tothe said shank,

in doing. which the knuiling on the shank produces corresponding formations in the bore of the gear so as'to prevent` arotation.

of the latter upon the shank.

` y Back 'of the ball 5, the two shank portions of 'the frame are bowed out into" opposed arch formations 7, thereby affording a bear ing for ashaft 8 carrying a disk A9.` This disk'has near its periphery a series of perforations spaced to match the spacing of the teethon the pinion 6, with which teeth the wallsr of the perforations are intermeshed, so that the disk forms a driving gear for rapidly rotating the pinion. Motion is imparted to the disk for this purpose through a crank handle 10 fastened to the disk, and the disk is prevented from being bent out of its intermeshed relation with the pinion by a finger 11 on the crossbar 4, as s hown in Figs. 2 and 8.

.At its forward end, the rotatable shank 3 is provided with suitable means for holding and gripping ldrill bits. For example, the tip ofthe shank may have longitudinal slots extending in two relatively transverse directions, thus forming four fingers 12, which are desirably tapered at their free ends."

Then each of the drills 13 may have a shank of a size fitting the bore of the forward end of the shank 3, this shank of the drill being `flattened at its rear end to enter the slot between the fingers 12, whereby these fingers will prevent the drill from rotating with respect to the shank 3. Thus arranged, the drill may be clamped'in position by a shell "14 threaded upon the shank 3 and tapered toy correspond to the tips of the fingers 12,

i sothat the'screwingof this shell 14 on the shank 3 willv flex the fingers 12 and cause the latter to grip the drill bit.

' To simplify the construction, the frame of my appliance is desirabiy formed of a singlestrip of steel having its ends overlapped `near the shaft 7, as shown in Fig. 1, so that a single rivet 15, together with the staking overy of the ends of the cross-bar 4, will hold the strip in vits desired form for affording proper bearings for the shaft 8 and the ball'5. In this manner, I am able to secure a rigid construction While using light material both-for the frame and for the rotating disk; and by suitably shaping the recesses which house the ball 5, I can provide for an adequate thrust bearing without requiring great accuracy in the assembling of ing of the pinion teeth with the perforationsY in the disk 9.

In assembling the tool as above described, there may, be little variations in the effective diameter of the gear 9, and this'diameter will be further varied by the wear on the'thrust ball and on the end of the shank 3. To allow for this, I desirably employ perfol rations in the disk 9 extending radially of Vthe latter 'for a greater distance than the width of the teeth of the pinion. For example, instead of entirely punching out the v pieces in making thev perforations, I may Vsides shorter than the width of the strip steel, the box being taperingv and rounded at its larger end. Then I insert this box in the handle loop before inserting the rivet 15, thus clamping the box within thi'sloop.

`To prevent the box from being slid out'of v the handle, I desirably concave the handleforming part of the strip as shown -in Figs. 4 and 5, so that the resulting loop will overhang the edges of the box andjwill effectively retain the latter, while the box in turn stiffens the handle. Then I close the box with a telescoping cover 17 and use this box for storing drill points 1 3 of various sizes. However, while Il have pictured and described the tool of my invention as in-V cluding a certain cheaply constructed form.-

of chuck, I do not wish to be limited Vto this or other details of the constructiony and arrangement here disclosechit being obvious that the same might be Yvaried in many ways pended claims. For' example, Figs. 7 and 8 v without departing from the spirit of the apshow an embodiment in ,whichV the'handlestifening drill-case -is omitted-and in Vwhich the teeth-engaging apertures 'inthe disk 9 are simple round holes. Fig. 6 shows'a construction in which the cross-baris lomitted' and an added rivet `14 is used between the gear and the thrustball, while the rear end of the chuck shank isjournaled in the recesses housing the thrust. ball, theseV recesses being correspondingly lengthened.

I claim as myinvention: Y

1. In a hand drill, a frame formed from a single strip of'metal and comprising a handle loop, a forward loop, and ashank portion connecting the two loops and conv Y sisting of strip parts overlapped longitudinally of the frame; the forward loop lia-v ing a perforation axialof the frame; a rota-f;

table shank extending through the said perforation axially of the'frame to the juncture of the forward loop with the said shank portion of the Vframe and journaled both inthe forward looprand at the said juncture,` and driving means carried by the shank por.-v tion of the frame for rotating the said rotatable shank. y Y Y 2. An appliance as per claim 1,'in combination with a perforated cross-bar spanning thev forward loop, therotatableshank extending through the perforation in the cross bar andbeing also iournaled therein.

3. In a hand drill, a frame `having as rgeeagsaz forward portion a loop. e uipped at its forward end with a perforation and having its sides overlapping longitudinally ofV the frame, a crossebar spanning the loop and having a perforation inI alinement with the aforesaid perforation, a-chuck shank-extend ing throughK the said perforation, a pinion fast on the shank back ofthe cross-bar, a thrust bearing for the shank, and driving means for rotating the pinion.

4. In a hand drill, a frame having as its forward portion a loop formed by doubling a strip of metal on itself, and perforated at its forward end; a chuck shank rotatably mounted in the said loop and extending forwardly through the said perforation, the two portions of the doubled strip having opposed recess formations at the rear end of the loop; and a single ball housed jointly by the recess formations and engaging the rear end of the chuck shank to form a thrust bearing for the latter.

5. A hand drill as per claim 3, in which the thrust bearing consists of opposed recess formations at the rear end of the loop and a single ball socketed in the said re cess formations.

6. In a hand drill, a frame having as its forward portion a loop equipped at vits forward end with a perforation, and having its sides overlapping longitudinally of the frame, a cross-bar spanning the loop and having a perforation in alinement with the aforesaid perforation, a chuck shank extending through the said perforation, a pinion fast on the shank back of the cross-bar, a thrust bearing for the shank, and driving means for rotating the pinion, the cross-bar having a finger overhanging the driving means to maintain the latter in operative relation to the pinion.

7. In a hand drill, a frame having its main member formed of a single strip of metal doubled twice on itself to form two loops joined by longitudinally overlapping portions, the rear loop forming a handle, and the overlapping portions being secured to each other adjacent to the handle and having opposed arch formations forwardly of the said securing point; the forward loop having a perforation axial of the frame; a shaft journaled in the said opposed arch formations and in the said perforation and extending axially of the frame; a shaft journaled in the frame between the said securing point and the said arch formations and extending transversely of the frame, and intermeshed gears fast respectively on the sai shaft and shank.

8. In a hand drill, a frame consisting of a single strip of metal doubled upon itself to form twoloops connected by a shank, and a drill case housed by one of the said loops and serving to stiften this loop.

Y 9. In an appliance of the class described, a frame formed of strip metal and includ` ing a loop having a perforationl at its forward end coaxially of the frame and having its opposite side portions extendedin overlapped relation rearwardly ofthe loop and nation with a pinion fast upon the rotatable shank, a gear rotatably mounted on the frame back of theV thrust ball and meshing with the said pinion, and means on the crossbar for holding the gear intermeshed with the pinion. Y

ll. In an appliance of the class described, a frame consisting of a single strip of metal extending longitudinally of the frame along the axis of both loops, the shank being composed of two overlapping strip portions having opposed recess formations at their juncture with the forward loop and having a pair of Vopposed substantially semi-cylindrical recess formations at a point back of the vaforesaid formations; means for securing the overlapped strip portions tov each other adjacent to the last named recess formations; a cross-bar spanning the forward loop and secured at both ends of the loop and having a perforation axial of the frame, the forward loop also having at its forward end a perforation coaxial with the frame; a rotatable shank j ournaled in the said perforations in the cross-bar and in the forward end of the loop, a transverse shaft j ournaled in the said semi-cylindrical recess formations, a gear carried by the transverse shaft, and a pinion fast upon the rotatable shank and intermeshed with the said gear.

12'. In an appliance of the class described, a frame formed from a single strip of metal bent fiatwise into two loops connected by overlapping strip portions extending longitudinally of the frame and substantially coaxial with both of the loops, one of the loops having its strip portions inwardly convexed, and stiffening means narrower' than the strip and housed by the last named loop and retained in position by the said convexing.

13. In a hand drill, a frame formed from a single strip of metal bent atwise to form two loops and a double thickness shank connecting the same, a chuck shank journaled in the forward loop` and coaxial with both bent to form two loops connected by a shank loops and with the aforesaid shank, and a drill ease clamped within the rear loop and stifening the same.

14. In a hand drill,'a frame formed from a single strip of metal bent flatwise to form two loops and a double thickness shank connecting the same, a chuck shank journaled in the forward loop and coaxial with both loops and with the aforesaid shank, a shaft j ournaled between the two thicknesses of 10 the shank and extending transversely ofthe general plane of the loops, a pinion on the chuck shank, and driving means on the shaft intermeshed with the inion.

Signed at Chicago, pril 14th, 1919..

ROBERT E. BEAUBIEN. 

